01-17-2013
Ending Spam and Etc.
This is a very general question but the idea popped into my head several years ago and wanted the opinions of all the master jedi's of this forum. I had a client that no matter what was done to control there spam(spam assassin,anti-virus(email scanning) and etc) sooner or later something would slip through. So out of frustration of looking at different solution to the INTERNET that seem to be good control mechanisms for combating SPAM, nothing seems to severally reduce the problem without being to restrictive in which the customer may not receive much email at all. So I though, why not just allow email from the domains from there existing customers and block everything else. Simply query what they already have and block the rest. When a new client comes in just add it to a whitelist. To me this would eliminate most of the trash that is out there and lessen the chance of something slipping in but not 100% bullet proof. In addition to that still have your second defense barriers in place such as SPAMASSASSIN and an anti-virus email scanner in place for the domains that are allowed through. Also use SSL/TLS authentication(pretty standard) to protect credentials from being used to read email and or send SPAM through the account. Though this sounds really restrictive, it just seems more logical when it comes to protecting a business. So maybe using Sendmail, I would add this stuff under:
/etc/mail/access
1-Who we accept mail from
2-Who we accept relaying from
3-Who we will not send to etc
Sendmail blocking spam email id, ips with access database
Any feedback is greatly appreciated.
Last edited by metallica1973; 01-17-2013 at 12:45 PM..
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LEARN ABOUT DEBIAN
log::handler::output::sendmail
Log::Handler::Output::Sendmail(3pm) User Contributed Perl Documentation Log::Handler::Output::Sendmail(3pm)
NAME
Log::Handler::Output::Sendmail - Log messages with sendmail.
SYNOPSIS
use Log::Handler::Output::Sendmail;
my $email = Log::Handler::Output::Sendmail->new(
from => 'bar@foo.example',
to => 'foo@bar.example',
subject => 'your subject',
);
$email->log(message => $message);
DESCRIPTION
With this output module it's possible to log messages via "sendmail".
METHODS
new()
Call "new()" to create a new Log::Handler::Output::Sendmail object.
The following options are possible:
from
The sender address (From).
to The receipient address (To).
cc Carbon Copy (Cc).
bcc Blind Carbon Copy (Bcc)
subject
The subject of the mail.
sender
This option is identical with "sendmail -f".
header
With this options it's possible to set your own header.
my $email = Log::Handler::Output::Sendmail->new(
from => 'bar@foo.example',
to => 'foo@bar.example',
header => 'Content-Type: text/plain; charset= UTF-8',
);
Or
my $email = Log::Handler::Output::Sendmail->new(
header => {
From => 'bar@foo.example',
To => 'foo@bar.example',
Subject => 'my subject',
'Content-Type' => text/plain; charset= UTF-8',
}
);
Or
my $email = Log::Handler::Output::Sendmail->new(
header => [
'From: bar@foo.example',
'To: foo@bar.example',
'Subject: my subject',
'Content-Type: text/plain; charset= UTF-8',
]
);
sendmail
The default is set to "/usr/sbin/sendmail".
params
Parameters for "sendmail".
The default is set to "-t".
maxsize
Set the maximum size of the buffer in bytes.
All messages will be buffered and if "maxsize" is exceeded the buffer is flushed and the messages will be send as email.
The default is set to 1048576 bytes.
Set 0 if you want no buffering and send a mail for each log message.
debug
Set 1 if you want to enable debugging.
The messages can be fetched with $SIG{__WARN__}.
log()
Call "log()" if you want to log a message as email.
$email->log(message => "this message will be mailed");
If you pass the level then its placed into the subject:
$email->log(message => "foo", level => "INFO");
$email->log(message => "bar", level => "ERROR");
$email->log(message => "baz", level => "DEBUG");
The lowest level is used:
Subject: ERROR ...
You can pass the level with "Log::Handler" by setting
message_pattern => '%L'
flush()
Call "flush()" if you want to flush the buffered messages.
validate()
Validate a configuration.
reload()
Reload with a new configuration.
errstr()
This function returns the last error message.
DESTROY
"DESTROY" is defined and called "flush()".
PREREQUISITES
Carp
Params::Validate
EXPORTS
No exports.
REPORT BUGS
Please report all bugs to <jschulz.cpan(at)bloonix.de>.
If you send me a mail then add Log::Handler into the subject.
AUTHOR
Jonny Schulz <jschulz.cpan(at)bloonix.de>.
COPYRIGHT
Copyright (C) 2007-2009 by Jonny Schulz. All rights reserved.
This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
perl v5.14.2 2012-11-21 Log::Handler::Output::Sendmail(3pm)